Single Atom Quasi-Penning Trap

Abstract
The combination of a circularly polarized microwave field and a magnetic field can be used to create a global equilibrium point—an outer minimum—in the electronic dynamics of Rydberg atoms. Stable motion can be maintained at this minimum and the Rydberg electron is localized both radially and angularly while moving on a circular Kepler orbit in a region of space that excludes the nucleus.